#ifndef MIDIMONSTER_HEADER
#define MIDIMONSTER_HEADER
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>

#define DEFAULT_CFG "monster.cfg"

struct _channel_value;
struct _backend_channel;
struct _backend_instance;

typedef int (*mmbackend_handle_event)(size_t channels, struct _backend_channel* c, struct _channel_value* v);
typedef struct _backend_instance* (*mmbackend_create_instance)();
typedef struct _backend_channel* (*mmbackend_parse_channel)(struct _backend_instance* instance, char* spec);
typedef int (*mmbackend_configure)(char* option, char* value);
typedef int (*mmbackend_configure_instance)(struct _backend_instance* instance, char* option, char* value);
typedef int (*mmbackend_process_fd)(size_t fds, int* fd, void** impl);
typedef int (*mmbackend_start)();
typedef uint32_t (*mmbackend_max_interval)();
typedef int (*mmbackend_shutdown)();

typedef struct _channel_value {
	double raw_double;
	uint64_t raw_u64;
	double normalised;
} channel_value;

typedef struct /*_mm_backend*/ {
	char* name;
	mmbackend_configure conf;
	mmbackend_create_instance create;
	mmbackend_configure_instance conf_instance;
	mmbackend_parse_channel channel;
	mmbackend_handle_event handle;
	mmbackend_process_fd process;
	mmbackend_start start;
	mmbackend_shutdown shutdown;
} backend;

typedef struct _backend_instance {
	backend* backend;
	uint64_t ident; /*FIXME needed? identification provided by name*/
	void* impl;
	char* name;
} instance;

typedef struct _backend_channel {
	instance* instance;
	uint64_t ident;
	void* impl;
} channel;

//FIXME might be replaced by struct pollfd
typedef struct /*_mm_managed_fd*/ {
	int fd;
	backend* backend;
	void* impl;
} managed_fd;

int mm_backend_register(backend b);
instance* mm_instance();
int mm_manage_fd(int fd, char* backend, int manage, void* impl);
int mm_channel_event(channel* c, channel_value v);
int mm_backend_instances(char* backend, size_t* n, instance*** i);
#endif